package com.fk.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.fk.reggie.common.BaseContext;
import com.fk.reggie.common.CustomException;
import com.fk.reggie.domain.*;
import com.fk.reggie.service.*;
import com.fk.reggie.mapper.OrdersMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * @author 凡凯
 * @description 针对表【orders(订单表)】的数据库操作Service实现
 * @createDate 2023-03-20 09:58:33
 */
@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {

    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 添加订单
     *
     * @param orders
     * @return
     */
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获取当前用户的id
        Long userId = BaseContext.getThreadLocal();


        //查询当前用户的购物车信息
        LambdaQueryWrapper<ShoppingCart> shoppingCartLambdaQueryWrapper = new LambdaQueryWrapper<>();
        shoppingCartLambdaQueryWrapper.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(shoppingCartLambdaQueryWrapper);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new CustomException("购物车数据为空，不能下单");
        }


        //查询当前用户数据   用来获取当前用户名
        User user = userService.getById(userId);

        //查询地址信息
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
        if (addressBook == null) {
            throw new CustomException("地址数据为空，不能下单");
        }


        long orderId = IdWorker.getId();//既是订单号又是订单id


        AtomicInteger amount = new AtomicInteger(0);  //订单总金额


        //将购物车数据转换为订单项数据
        List<OrderDetail> orderDetailList = shoppingCartList.stream().map(item -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //填充订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));


        //往订单表添加一条数据
        this.save(orders);
        //往订单明细表添加多条数据
        orderDetailService.saveBatch(orderDetailList);
        //清空当前用户的购物车信息
        shoppingCartService.remove(shoppingCartLambdaQueryWrapper);

    }
}




